Ti(III)-Catalyzed Cyclizations of Ketoepoxypolyprenes: Control over the Number of Rings and Unexpected Stereoselectivities was written by Morcillo, Sara P.;Miguel, Delia;Resa, Sandra;Martin-Lasanta, Ana;Millan, Alba;Choquesillo-Lazarte, Duane;Garcia-Ruiz, Juan M.;Mota, Antonio J.;Justicia, Jose;Cuerva, Juan M.. And the article was included in Journal of the American Chemical Society in 2014.Category: esters-buliding-blocks The following contents are mentioned in the article:
We describe a new strategy to control the number of cyclization steps in bioinspired radical (poly)cyclizations involving epoxypolyenes containing keto units positioned along the polyene chain. This approach provides an unprecedentedly straightforward access to natural terpenoids with pendant unsaturated side chains. Addnl., in the case of bi- and tricyclizations, decalins with cis stereochem. have been obtained as a consequence of the presence of the ketone. The preferential formation of cis-fused adducts was rationalized using DFT calculations This result is completely unprecedented in biomimetic cyclizations and permits the access to natural terpenoids with this stereochem., as well as to non-natural analogs. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Category: esters-buliding-blocks).
(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is γ-valerolactone.Category: esters-buliding-blocks
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics